Building-block machine.



" A. H. LEHMAN.

Hummm pLocKMAcHNE. APPLICTIONTILED MAR-'15, |918.

Patented Dee/10,1918.-

A. HL-LEHMAN.

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Patented Dec. 10, 1918.v

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A. H. LEHMAN.

Bumm@ BLocK MACHINE.

APPLICATION FILED MAR. I5. 191B- y 1,287,055. Patented De@.10,1918. s sus' sssssss n a.

' f n'uantoz WIT/756555 l a ,HL67z-7za717 ARTHUR H. LEHMAN, 0F DES MOINES, IOWA.

BUILDING-BLOCK MACHINE.

Specicat'on of Letters Patent.

4 Patented nee. io, reis.

Application filed March 15, 1918. Serial No. 222,787.

To all whom t may. concern.'

Be it known that I', ARTHUR H. LEHMAN, citizen of the United States, residing at Des Moines, in the county of Polk andState of Iowa, have invented new and useful lmprovements in Building-Block Machines, of which 'the following is e. specilication.

This invention relates to molds for concrete blocks, andthe object is to provide a structure in which a pluralityof blocks may be formed at one time, one side wall of the structure being prf-ided with a series -of projections for forming the recessed portion of the completed block and the other side of the mold being formed with recesses for producing the projecting portions of the blocks. Each side member of the mold is grooved vertically for the accommodation of partition members, and the latter very in structure depending upon the type of block to be molded.

A. still further object is to provide a core of certain novel construction for a mold of the type indicated, the core extending entirely through the-series of partitions and being collapsible to permit the easy 'with- .mem er,

drawal thereof.

With the foregoing and other objects in view, the invention consists in the novel construction, combination, and arrangement oi' elements hereinafter described and claimed.

In the drawings,

Figures 1 and 2 are perspective views of the opposite side members of the mold,

Fig. 3 is a plan View, with parts broken away,-l

1g. Fig; 3,

Fig. ,5 is a fragmentary view, in vertical longitudinal section,

Fig. 6 is a transverse section, the mold having a different form of side wall,

Fig. 7 shows the side wall last named, in perspective,

Fi 8 is a transverse section of the core :is a section o n the'iine 4 4 of Figs. 9 to 12, in perspective, show various forms of partition walls, receiving the collapsible core,

Figs. 13 and 14 show types of the blocks produced.

ln carrying out my invention l provide a mold having sides 1.0 and 12, the former beino formed with projections for producing -the recessed portion of the completed blocks,

and the opposite side being provided with recesses for forming the projecting portions of the completed'b ocks.

Each of the side members is grooved vertically at intervals as shown at 14, accommodating the partition members 15 formed as indicated below. i a plurality of collapsible members is. designed to extend through openings in the partition members. The face plateli" forms the bottom of the mold.

In Figs. 9 to 12.1 have shown a number of partition members of various forms used in producing blocks of different shapes. The partition 20 is employed for a straight block,

the partition 21 for a jam block, the partition 22 for a chimney block, and the partition.23 for right and left chimney blocks.

The core 16 formed of ln Fig. 7 I have shown a side member 25 for the mold used in forming a jam block.

The core'comprises an upper plate 30, a plurality of side members 31 and 32 hinged thereto and providedwith beveled portions 33, and a bottom member comprising a. plurality of sections. One of these sections is designated 34 and has hinged thereto a strip 35, triangular in cross section, another bottom member` 36 abutting the opposite side' of the strip 35 but not being secured thereto. The hinges for the strip are shown at 37 and the hinges for the side members arev shown at 38. The triangular strip is located between the beveled portions 40 and 41 of the members 34 and 36, iWhen it is desired to collapse the core the strip 35 is turned upwardlyI and toward the right as shown in Fig. 3 and bottom member 36 is withdrawn or pulled out, being first moved toward the center if desired. Bottom memmembers 31 and 32' to be folded on the top member 30, whereby the remaining portion of the core may be removed after the blocks have set.

As the blocks are not claimed per se 1n this application certain of them only are y illustrated in order to show more clearly 1. ln a device of the class'descrihed, a

mold including a plurality oi" side members and a bottoni member, and a core comprising an upper plate, slde members hinged thereto, a plurality of lower members spaced apart and a. strip hinged to one of these lower members and filling the space between adjacent edges of said members.

In a device of the class described, a mold comprising a plurality of side members, a bottom member, and partition -members provided with openings therein for recciving a core, and a collapsible core comprising a plurality of hinged members certain of which are separated from each other by a hinged strip, said hinged members being movable toward each other on axes longitudinally of the core and transversely of the (Walls of the partitions.

In a device of the class described, a core for a concrete mold comprising an upper plate member, side members hinged thereto, a plurality of bot-tom members spaced apart longitudinally along av line extending a proximately centrally and longitudinally of the bottom of the core, and a member triangular in cross section located between theI spaced portions.

In testimony whereof I affix my signature.

ARTHUR H. LEHMAN, 

